Audition Installation - language problem?

I've just installed Adobe Audition CC 2015 on my Mac Pro, and when I opened it, all the text is seemingly gibberish (see screenshot): audirtionproblem.jpg
In troubleshooting this, I double-checked the global Creative Cloud language settings, tried using the Adobe CC Cleaner tool, installed previous versions, logged in under a different CC username to install, all to no avail. All other installed Adobe apps work fine. Any suggestions welcome!
- Nick